Your husband's been coming home from work everyday for the past ten years at 5 p.m., but recently he's pushing the arrival time to 9 p.m. or so. Or maybe he used to go out with pals once a week and now he is stepping out three to four times a week, acting secretive and jumpy. Plus Mr. Practical traded in the mini-van for a Dodge Viper and you're no longer invited to ride along.

Occasionally there are reasons why you can't join him, but he should be making an attempt to involve you. Invite yourself along when he goes out with his friends. If he's working late, offer to bring him dinner. If he declines, look into the situation.

Is he leaving for work much earlier than he needs to and coming home later? Unfaithful partners may leave the house right after their shower, just to have breakfast with someone else. Is this another change habit that is unexplained?

He says he has to take a business trip, even though his company's travel budget has been slashed. Business trips that used to be short now start on Friday and require an entire weekend because he says he likes get settled in his hotel room and use the alone-time to prepare for Monday's presentation. He says it's against company policy to bring you along. Or, regardless of "buy one, get one free" airline and hotel specials, he says, "we can't afford" to extend his business trip into a mini-vacation for both of you.

He finds reasons not to participate in family events, needing to help a friend move or work out at the gym. He says he doesn't feel comfortable joining your family for a special dinner, but doesn't want you to stay home with him.

His job and his paycheck are the same but his workload seems to have doubled. He now works late into the night and weekends. And why won't he discuss the details of that huge, time-consuming project he's now on? He refuses to meet near his office for a late-night date, explaining that he can't be interrupted. When he comes home, it's right to bed. And it's sleep, no pillow talk.

He earns money but none of it seems to come home. He makes excessive ATM withdrawals, but he can't point to any large purchases to explain where the money went. He borrows money from you. One explanation: Affairs are costly. There are dinners, gifts and getaways.

You both used to have an open-door policy concerning shared finances, but now he insists on handling it all. He accuses you of snooping in his wallet or briefcase. Maybe he hides them. There's a difference between one partner taking care of balancing the checkbook and someone suddenly being secretive about checking account balances.

There are expenditures and phone numbers that he doesn't want you to see, so he has credit card and phone bills sent to his work instead of home. Or maybe he's rented a mailbox for bills, new credit cards or private letters. He doesn't tell you, but you stumble across the U.S. Post Office key or see it on his key chain. Sometimes, there is a valid reason for establishing a mailbox address. Frequent movers use them but usually not someone who has lived in the same house for fifteen years. Someone may want a post office box for safety reasons, too. But do you both know the location and have access to a key? Women who have hired our private investigative firm to complete surveillance are shocked to learn that their partner has a private, secret box.

Your boyfriend is buying expensive clothes and paying particular attention to his hair. Telltale sign: the man who used to lube his car now sports manicured nails. He may be boosting his self-esteem, but there also may be another reason for this "extra effort."

He comes home from a long day of work appearing freshly showered, well-groomed and smelling better than when he left. Is that new cologne he's wearing?

He's wearing gold rings or chains for the first time. Or you find out that he's buying women's jewelry but you haven't seen any of it. Could it be a gay fantasy? Nah.

He keeps cologne, hair spray or blankets in his car. Ticket stubs, hotel keys, greeting cards, lipstick holders, earrings and condom wrappers find their way into your home without explanation.

He has a sudden commitment to improving his physique. Or he joins a gym, tells you he's going there every day but his appearance doesn't seem to change from month to month. He denies that health clubs are good places to meet people. And even though he says he's benefiting, he doesn't want you to work out at the same gym.

The number of hang-up telephone calls at your home has jumped. But when he answers the phone, someone is always on the other end. You push *69 and use caller ID to investigate hang-up calls. Or after he has made a call, you hit the redial button, but you do not know the person or company on the other end of line.

He now has a pager even though his work does not involve emergencies. He explains it by saying he wants you and friends to reach him at any time. He keeps it close to him; at night, he puts it in a drawer in his bedside table. He receives pages from unfamiliar phone numbers or with codes like "11691." He hides his pager and cellular bills.

He used to always be ready for sex, despite mood, workload or stress level. Lately, you have expressed interest and he's hesitant. Instead of taking the time to talk, he now walks out mid-sentence and refuses to finish the conversation. Fights are more frequent and they never get resolved.

He no longer freely gives information. He does not want to join you for lunch. He starts an argument when you ask about his plans, thereby avoiding the question and making you think twice before you quiz him again.

Two of your girlfriends saw your boyfriend with a woman at a bar, but when you questioned him about it, he said he was working late. It's time to: 1) see if he has a twin or 2) take a serious look at what's going on.

He gets on your case when you ask something simple, like how his day was. He's irritable and easily provoked.

Does he get angry by your surprise visits to his office even though it's not inconvenient or inappropriate for you to be there? Maybe he doesn't want you to meet any of the new female employees at the office.